Stockholders' Equity - Reconciliation of Number of Shares of Common Stock (Details) - shares shares in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Stockholders Equity Note [Abstract]
Common stock, beginning of period	39,306	41,207
Shares of common stock issued upon lapse of restricted stock units (“RSUs”)	150	183
Common stock retired	(42)	(930)
Common stock, end of period	39,414	40,460

Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section 50
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Period Type:	duration